What Are AI Coding Agents? The Complete Guide for Developers (2026)
A few years ago, AI coding tools just suggested the next line while you typed. Helpful, but you still wrote most of the code. That changed completely. In 2026, AI coding agents don’t just suggest — they plan, write, test, and ship code on their own. You describe what you want, and the agent builds it. It creates files, edits existing code, runs your tests, fixes failures, and opens a pull request. ...